target_core_fabric.h | Explore in Territory

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef TARGET_CORE_FABRIC_H
#define TARGET_CORE_FABRIC_H

#include <linux/configfs.h>
#include <linux/types.h>
#include <target/target_core_base.h>

struct target_core_fabric_ops { … };

int target_register_template(const struct target_core_fabric_ops *fo);
void target_unregister_template(const struct target_core_fabric_ops *fo);

int target_depend_item(struct config_item *item);
void target_undepend_item(struct config_item *item);

struct se_session *target_setup_session(struct se_portal_group *,
		unsigned int, unsigned int, enum target_prot_op prot_op,
		const char *, void *,
		int (*callback)(struct se_portal_group *,
				struct se_session *, void *));
void target_remove_session(struct se_session *);

void target_stop_cmd_counter(struct target_cmd_counter *cmd_cnt);
void target_wait_for_cmds(struct target_cmd_counter *cmd_cnt);
struct target_cmd_counter *target_alloc_cmd_counter(void);
void target_free_cmd_counter(struct target_cmd_counter *cmd_cnt);

void transport_init_session(struct se_session *se_sess);
struct se_session *transport_alloc_session(enum target_prot_op);
int transport_alloc_session_tags(struct se_session *, unsigned int,
		unsigned int);
void	__transport_register_session(struct se_portal_group *,
		struct se_node_acl *, struct se_session *, void *);
void	transport_register_session(struct se_portal_group *,
		struct se_node_acl *, struct se_session *, void *);
ssize_t	target_show_dynamic_sessions(struct se_portal_group *, char *);
void	transport_free_session(struct se_session *);
void	target_spc2_release(struct se_node_acl *nacl);
void	target_put_nacl(struct se_node_acl *);
void	transport_deregister_session_configfs(struct se_session *);
void	transport_deregister_session(struct se_session *);


void	__target_init_cmd(struct se_cmd *cmd,
		const struct target_core_fabric_ops *tfo,
		struct se_session *sess, u32 data_length, int data_direction,
		int task_attr, unsigned char *sense_buffer, u64 unpacked_lun,
		struct target_cmd_counter *cmd_cnt);
int	target_init_cmd(struct se_cmd *se_cmd, struct se_session *se_sess,
		unsigned char *sense, u64 unpacked_lun, u32 data_length,
		int task_attr, int data_dir, int flags);
int	target_submit_prep(struct se_cmd *se_cmd, unsigned char *cdb,
		struct scatterlist *sgl, u32 sgl_count,
		struct scatterlist *sgl_bidi, u32 sgl_bidi_count,
		struct scatterlist *sgl_prot, u32 sgl_prot_count, gfp_t gfp);
int	target_submit(struct se_cmd *se_cmd);
sense_reason_t transport_lookup_cmd_lun(struct se_cmd *);
sense_reason_t target_cmd_init_cdb(struct se_cmd *se_cmd, unsigned char *cdb,
				   gfp_t gfp);
sense_reason_t target_cmd_parse_cdb(struct se_cmd *);
void	target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
		unsigned char *, u64, u32, int, int, int);

int	target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
		unsigned char *sense, u64 unpacked_lun,
		void *fabric_tmr_ptr, unsigned char tm_type,
		gfp_t, u64, int);
sense_reason_t	transport_generic_new_cmd(struct se_cmd *);

void	target_put_cmd_and_wait(struct se_cmd *cmd);
void	target_execute_cmd(struct se_cmd *cmd);

int	transport_generic_free_cmd(struct se_cmd *, int);

bool	transport_wait_for_tasks(struct se_cmd *);
int	transport_send_check_condition_and_sense(struct se_cmd *,
		sense_reason_t, int);
int	target_send_busy(struct se_cmd *cmd);
int	target_get_sess_cmd(struct se_cmd *, bool);
int	target_put_sess_cmd(struct se_cmd *);
void	target_stop_session(struct se_session *se_sess);
void	target_wait_for_sess_cmds(struct se_session *);
void	target_show_cmd(const char *pfx, struct se_cmd *cmd);

int	core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
void	core_tmr_release_req(struct se_tmr_req *);
int	transport_generic_handle_tmr(struct se_cmd *);
void	transport_generic_request_failure(struct se_cmd *, sense_reason_t);
int	transport_lookup_tmr_lun(struct se_cmd *);
void	core_allocate_nexus_loss_ua(struct se_node_acl *acl);

struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
		unsigned char *);
bool	target_tpg_has_node_acl(struct se_portal_group *tpg,
		const char *);
struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
		unsigned char *);
int	core_tpg_set_initiator_node_queue_depth(struct se_node_acl *, u32);
int	core_tpg_set_initiator_node_tag(struct se_portal_group *,
		struct se_node_acl *, const char *);
int	core_tpg_register(struct se_wwn *, struct se_portal_group *, int);
int	core_tpg_deregister(struct se_portal_group *);

int	target_alloc_sgl(struct scatterlist **sgl, unsigned int *nents,
		u32 length, bool zero_page, bool chainable);
void	target_free_sgl(struct scatterlist *sgl, int nents);

/*
 * The LIO target core uses DMA_TO_DEVICE to mean that data is going
 * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean
 * that data is coming from the target (eg handling a READ).  However,
 * this is just the opposite of what we have to tell the DMA mapping
 * layer -- eg when handling a READ, the HBA will have to DMA the data
 * out of memory so it can send it to the initiator, which means we
 * need to use DMA_TO_DEVICE when we map the data.
 */
static inline enum dma_data_direction
target_reverse_dma_direction(struct se_cmd *se_cmd)
{ … }

#endif /* TARGET_CORE_FABRICH */
linux/include/target/target_core_fabric.h
